Active and Available Inventory (AAI) is the OpenECOMP subsystem that provides real-time views of available Resources, Services, Products, Offers, and their relationships. A&AI not only forms a registry of active, available, and assigned assets, it also maintains up-to-date views of the multidimensional relationships among these assets, including their relevance to different components of OpenECOMP.
A&AI is continually updated in real-time as changes are made within the cloud. A&AI is metadata-driven, allowing new inventory item types to be added dynamically and quickly with Service Design and Creation (SDC) catalog definitions, eliminating the need for lengthy development cycles.
The A&AI subsystem uses graph data technology to store relationships between inventory items. Graph traversals can then be used to identify chains of dependencies between items. Relationships captured by AAI include “top to bottom” relationships such as those defined in SDC when products are composed of services, and services are composed of resources. It also includes “side to side” relationships such as end-to-end connectivity of virtualized functions to form service chains. AAI also keeps track of the span of control of each controller, and is queried by MSO and placement functions to identify which controller to invoke to perform a given operation.
AAI data views can be used by homing logic during real-time service delivery, root cause analysis of problems, impact analysis, capacity management, software license management and many other functions.
AAI is metadata driven, allowing new inventory item types to be added dynamically and quickly via SDC catalog definitions, reducing the need for lengthy development cycles.
An API is available.
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Figure 12 provides a functional view of AAI.
A&AI Functionality
AAI includes the following functions:
- Inventory and Topology Management
- Administration
- and Reporting and Notification.
Inventory and Topology Management
AAI federates inventory using a central registry to create the global view of D2 inventory and topology. A&AI receives updates from the various inventory masters distributed throughout the D2 infrastructure, and persists just enough to maintain the global view. As transactions occur within D2, AAI persists asset attributes and relationships into the federated view based on configurable metadata definitions for each activity that determine what is relevant to the AAI inventory. AAI provides standard APIs to enable queries from various clients regarding inventory and topology. Queries can be supported for a specific asset or a collection of assets. The A&AI global view of relationships is necessary for forming aggregate views of detailed inventory across the distributed master data sources within D2.
Administration
AAI also performs a number of administrative functions. Given the model driven basis of ECOMP, metadata models for the various catalog items are stored, updated, applied and versioned dynamically as needed without taking the system down for maintenance. Given the distributed nature of AAI as well as the relationships with other ECOMP components, audits are periodically run to assure that AAI is in sync with the inventory masters such as controllers and MSO. Adapters allow A&AI to interoperate with non-D2 systems as well as 3rd party cloud providers via evolving cloud standards.
Reporting and Notification
Consistent with other ECOMP applications, A&AI produces canned and ad-hoc reports, integrates with the ECOMP dashboards, publishes notifications other ECOMP components can subscribe to, and performs logging consistent with configurable framework constraints.